Internal-combustion engine



E; OPFERKUCK INTERNAL COMBUSTION ENGINE y Filed April fly,

@mem/bo@ Malch 10 March im. 1925'.

E.- @Pi-'ERPQJQK INTERNAL COMBUSTI ON ENGINE FiledApril 17, 922 2 shees-sheetv 2 Patented Mar. 10, 1925.

, yUNITED STATES PATENT .o

Letse EMIL OPFERKUCK, OF SPRINGFIELD, OHIO, SS'IGINO'R TO THE SUPERIOR GS lEdkTGIN COMPANY, OF SPRINGFIELD, OHIO, A CORPORATION OF OHIO INTERNAL-CO1YVIBUSTION ,ENGINE Application lednpril 17, 1922. Serial No. 554,031.

To all whom z't may concern.'

"Be it known that I, EMIL OrFEnKUoK,v a ,citizen4 of the United. States,

Springfield.y inV the county of Clarke-nd I State of' Ohio, have invented certain new and useful Improvements in Internal-Combustion Engines, of. which the followingv is a. specification. z

This invention relates to improvements in internal combustion engines, it relating particularly to that type of engine in which the explosive charge isformed in the cylinder and ignited by an ignition member whichfis maintained inheatedcondition bythe burn l-ing fuel.'

An object of the inventionisito provide improved means `tor scavenging the cylinder of a two-cycle engine; amore partieular object in this connection being the provisionl of an air supply under pressure. which is automatically admitted to. .the `c'ombustioii chamber by the reduction ofpressure in the cylinder when the exhaust port is uncovered;

A further objectof the invention -is to provide improved-means for preventing the overheating oftheignition member; amore spe'c'c object in vthis connection being to provide means for injectmga.quantityl of air under pressure at a point in close proximity to the ignition member which acts-to cool the said'member.

A further object ofthe invention is to pro-v vide means for also injectingwaterinto the combustion chamber at a point in close proximity :to the ignition member to further assist in lcooling said member under certain 'conditions ofoperation. y

A further object of the. inventionjs the provision, in a two-cycle'eng'ine, of an automatic air supply to not only cool the ignition member and sca-venge the cylinder, but :form a part of the explosive'mixture. In the accompanying drawingsy Fig. 1 isa lon itudinalsection of the cylindex' off'an exp osive` enginelto' which y improvements have been applied. A, Fig. 2 is a .sideelevation of the samen'. Fig. 3 is a sectioneljview 'of the air ad mission valve, the" Section being `on 'the-line -ofFig/e. FFig. 4 is a section'on `the-line 1+i of 1g.

There is shown'in the drawings'onl 'muchof the engine as 1s necessary to 1 us'-l trate the impreyements, the engine shown residing at s being of the .tvo-cycletype Theeyiinde is indicated at 1 andis surrounded at its forward end by the usual water jacket 2, a water jacketed head 3 bein connected to the forward end of the cy inder and its jacket. n-air chamber 21 is formed about the rear end 'of the cylinder, which is shown as an :integral part of the base 5, mounted upon the block 6. The piston is shown at 7, andS. representsthe piston rod whichpasses through the usual stuffing box-9 in the-par` .tition 10 at the rear end of the air chamber The head 3 is formed with a combustion chamber 11 which communicates with thev forward end of the cylinder through the restricted orifice 12 and located in this Vhead is a fuel injection valve, 13 of any usual'type employed in oil burning engines. An igniter member consisting. of a cup-shaped-part 14 of a weliknown form is inserted in the open forward end of the cylinder head and `terior ofthe vcylinder when the port'17 is uncovered by the piston at the en'd of the explosive` stroke and an exhaustl port 18, also uncovered by the pistonat ormear the end of the same stroke, p'laces the interior of the cylinder in communication with the water-jacketed exhaust 19.

Mounted on the head 3 is a valve `casing 2O which communicates with the air chamber 4 through a pipe-connection 21, a valve 21"- beingvpreterably placed in this connection to provide for regulating the air sup-I ply. The casing 20 communicates with the` interior of the head through the port 22, which port is in close proximity to the igniter cup14. The chamber 420 has a port communicatin with the port 22 and controlled by a va ve 23, the stem 24 of lwhiclfl is slidably mounted inthe casing 20 and is acted upon by a coil spring 25, interposed we between the upper side of the casing 2G and -a head 26 on the end ot the stem, so as to normally hold the valve to its seat.

Also-leading into the interior oi the 'naive leasing 20 is a small pipe 2which has its ce -other *end connected at any suitable point iwiththe interior ot thewater jacket for the cylinder, the point of "connection being shownas the place where the water di J1-,$513- plpe leads theretwm Also connected with the interior of the valve chamber 2O is a third pipe 29 which is 'connected with any suitable source of air supply under pressresuch as an, air pressure tank (not shown) .The operationis as `follows: The igniter cup is irsthe'atedfby a blowtorch to the desired degree of heat-to Vaporize the fuel and 4ignite the explosive mixture.. Upon eachkexplosive stroke of the piston, air is compressed thereby inthe chamber 4, and,

,through the` connecton'21, also in the Valve chamber 20. As soon` as the exhaust port v- 18 is uncoveredat or*nearv the end of the explosive'stroke of the pistonthe air valve 23 willcpen under pressure and permit la blas'tof'air and waterto be sprayed upon the -:igniter member 14, this air acting. also to force out through the exhaust the products,

ofcombustion .of the exploded' charge. At this point airis also admitted through the `oort 1.7 which ltogetherfwith the air admitted l throughthgvalve 23 mingles with the fuel upon the compression stroke of the-piston to form {thernew charge of explosive miX- tu`re;fthe=fuel valve Aautomatically opening at .the lproper point on the compression'stroke of the piston to admit the oil fuel in a well known way.

Having thus described my invention, II"

claim s .1. In an internal combustion engine, `a cylinderv and piston; a combustion chamber at the ,-forward'end of said cylinder, a re-` stricted passage from said 'combustion chamber said cylinder having end walls projecting outwardly from said passage Way, .a compression chamber, air inlet and discharge uncovered by'sa'id piston, near the end of its power stroke, air passages to said combustion chamber, and an igniter plate'im clined below the airinlet, whereby airv will be swept down oversaid inclined igniter plate in a directionfat aninclination to said lpassage way and air likewisewill be' admitted to said cylinder for scavenging said' .ber to said-cylinder having end walls projecting. outwardlyfrom said passage Way, a

compression chamber, airl inlet, and discharge'uncovered'by said piston, near the end. of its power stroke, air passages to said combustion chamber and an igniter plate l projecting towards the passage between said combustion; chamber and 'cylinder and ex tending across `the center vline extended of said passage," whereby the -air will sweep downwardly over said plate and has a swirlingmovement past the .said center vline vextended 'within -said "combustion, chamber while the air-,is beingadmitted to the cylinder `.for scavengingsame. A

In testimony whereof@ have hereunto set my hand this l145th day of April, 1922.

EMIL OPFERKUCK.

2. In an lnternal combustion engine, a4 

